comment on bad blob usage

src/packet.rs

@@ -246,6 +246,7 @@ pub fn to_blob<T: Serialize>(
         let mut b = blob.write().unwrap();
         let v = serialize(&resp)?;
         let len = v.len();
+        //TODO: we are not using .data_mut() method here because the raw bytes are being serialized and sent, this isn't the right interface, and we should create a separate path for sending request responses in the RPU
         b.data[..len].copy_from_slice(&v);
         b.meta.size = len;
         b.meta.set_addr(&rsp_addr);